How we are

I was pondering about this recently, and I wonder. Why is it do we keep struggling to live? Why do we keep going, against all odds? It seems to me that it is against our nature as a race to give up. We stay the course because we honestly lose our humanity if we give up. What happens when we do? We become one of two things, a vegetable, motionless and non responsive. As we idly sit the world passes us by. Or we become an animal, and lose our humanity. We stop caring about other lives, our own life, and become dangerous and confused. I guess thats why they call a man a couch potato. So we keep striving and straining, so as to not lose who we are. Would the world be a better place if we all didn't give up? On ourselves or each other?